The track membrane porous structure and selective properties investigation

The difference between track membrane pore diameter values, obtained with methods of 'bubble point' (DBP), hydrodynamics (DHD) and scanning electron microscopy (DSEM), was investigated. It was found that DSEM>DHD>DBP and this relation is significant for small pore. This phenomenon is explained on the basis of ''double-cone'' pore shape. The equation was derived, which presented a relation between these values. The results of calculation were compared with experimental results. The dependence of track membranes tested selectivity on particle size-to-pore size relation was obtained in experiment on latex particles filtration. It was shown, that this dependence is effected by the pore diameter calculation method